he's fixated on elizabeth warren's racial heritage. in fact, he's lnching thisew atta a an race is the first thing talked about the in debate. >> warren claimed she was a native american, a person of color, and as you can see, she's not. i don't know, and neither do the viewers know, whether in fact she got ahead as a result of the checking of the box. tin in the latest polls, but he seems convinced this race issue will get him reelected. joining me is joan walsh,uthor of the book "what's the matter with white peop?" nit to yh u i'm stunned at senator brown's office and their reaction to those chants. your thoughts on this. >> it's just another outbreak of frat boy conservatism. to go anmock someone's rial eneabohe story, i thought, you know, they are some volunteers or overzealous republicans. to find out that four of them are on his staff, it's trageous. but i was watching the debate and when he brought this claind h sa clearly she's not cherokee, look at her, i was like, what planet does this man live on where as a white man he gets